The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 2010
Filed:
May. 08, 2007
Shinji Nakagawa, Hitachinaka, JP;
Kazuhiko Kanetoshi, Yokohama, JP;
Kozo Katogi, Hitachi, JP;
Takanobu Ichihara, Naka, JP;
Minoru Ohsuga, Hitachinaka, JP;
Shinji Nakagawa, Hitachinaka, JP;
Kazuhiko Kanetoshi, Yokohama, JP;
Kozo Katogi, Hitachi, JP;
Takanobu Ichihara, Naka, JP;
Minoru Ohsuga, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An engine controller comprises a combustion state detection or estimation means for detecting or estimating a combustion state in the combustion chamber, a combustion air-fuel ratio estimation means for estimating a combustion air-fuel ratio in the combustion chamber according to an exhaust air-fuel ratio and the detected or estimated combustion state, and a means for calculating engine control parameters according to the estimated combustion air-fuel ratio.